package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import io.swagger.v3.oas.annotations.Operation;
import javassist.bytecode.SignatureAttribute;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.text.Annotation;
import java.time.LocalDateTime;

/**
 * 自定义切面类，为公共字段自动赋值
 */
@Aspect
@Component
@Slf4j
public class AutoFillAspect {

/**
 *切入点
 */
@Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointCut(){}
@Before("autoFillPointCut()")
public void autoFill(JoinPoint joinPoint) throws NoSuchMethodException {
    log.info("公共字段自动填充...");

//获取被拦截的数据库操作类型

    MethodSignature signature=(MethodSignature) joinPoint.getSignature();//获取签名
    AutoFill autoFill=signature.getMethod().getAnnotation(AutoFill.class);//获取方法上的注解
    OperationType operationType=autoFill.value();//获取注解的类型
    Object[] args = joinPoint.getArgs();//获取当前方法上的参数
    if (args==null||args.length==0)
        return;
    Object entity=args[0];//接收参数
    LocalDateTime time=LocalDateTime.now();
    Long empId= BaseContext.getCurrentId();


    //根据不同的操作类型，为对应的属性通过反射来赋值
    if (operationType==OperationType.INSERT){
        try {
        Method setCreateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
        Method setCreateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
        Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
        Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);

            setCreateTime.invoke(entity, time);
            setCreateUser.invoke(entity,empId);
            setUpdateTime.invoke(entity,time);
            setUpdateUser.invoke(entity,empId);
        } catch (Exception e) {
            log.error("公共字段填充失败;{}",e.getMessage());
        }
    }
    else if (operationType==OperationType.UPDATE){
        try {
            Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
            Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
            setUpdateTime.invoke(entity,time);
            setUpdateUser.invoke(entity,empId);
        } catch (Exception e) {
            log.error("公共字段填充失败;{}",e.getMessage());
        }

    }

}




}
